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def recursive_defaultdict():
    """x = recursive_defaultdict()
        x['key0']['key1'] = 'value'  # etc."""
    return defaultdict(recursive_defaultdict)

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Upgrades break custom settings

Homebrew upgrades will overwrite the settings file linked to /usr/local/etc/Muttrc (e.g. /usr/local/Cellar/mutt/1.14.6/etc/Muttrc). Copying over it will restore customized settings. cp ~/repos/dotfiles/Muttrc /usr/local/etc/Muttrc

Set correct permissions

https://lists.debian.org/debian-user/2002/01/msg00172.html

• The user does not matter but the group must be 'mail'.
• Permissions do matter.

chown root:mail /usr/local/bin/mutt_dotlock

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SELECT
	datid,
	datname,
	pid,
	backend_type,
	application_name,
	--xact_start,
	query_start,
	state_change,
	--wait_event_type,

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-- https://dba.stackexchange.com/a/161761
SELECT
     max_conn,
     used,
     res_for_super,
     max_conn-used-res_for_super res_for_normal
 FROM
     (
     SELECT
         COUNT(*) used

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Prep

• >=32GB SD card formatted to FAT32 (MS-DOS)
• my.audiusa user name and password
• Java 8 (because 11 doesn't work)

Steps

1. https://www.audiusa.com/myaudi
2. Click on "Audi connect® services and Key User registration" icon, underneath image of car
3. Click on "Services" tab if not selected
4. Click on "Map update"

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SELECT setval('your_sequence_name', (SELECT max(id) FROM your_table));

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Problem

After updating conda to version 4.4.x, the fish shell wrapper intended to define a conda function that knows the path of the conda executable and calls it regardless of whether the Anaconda/Miniconda installation is in $PATH. For me, this fails with

⋊> ~ conda activate base
fish: Unknown command 'shell.fish'
- (line 1):
begin; shell.fish activate base
 ^

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1. Download and install rEFInd

Follow @astrofloyd's instructions, including:

1. Obtain a copy of ISO 2 USB EFI Booter for Mac
2. diskutil list to find the node name of your USB drive
3. Format the USB drive with a single FAT32 partition (use diskutil eraseDisk fat32 UNTITLED /dev/diskX)
4. cd into the drive and mkdir -p efi/boot (from the computer's root drive the path should look something like /dev/diskX/efi/boot)
5. Copy bootIA32.efi onto the USB drive and rename it: cp /location/of/bootIA32.efi ./boot.efi
6. Copy the Linux distribution .iso file and rename it to boot.efi

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<!-- https://github.com/dear-github/dear-github/issues/166#issuecomment-322367328 -->

<details>
 <summary>Click to see</summary>
 
```python
True is not False
```

</details>

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For building and installation with conda.

Make a working directory

cd /tmp
mkdir foo
cd foo

Download Conda recipe from Github

wget the links if you so desire